Abstract

The article reports on the properties of a new class of arylene–ethynylene semiconductors incorporating anthracene and the bridged bithiophene dithienopyrrole. Two monodispersed structures were synthesised: the first with a dithienopyrrole core bound to two anthracenyl–ethynyl side groups namely the 2,6-bis(anthracen-9-ylethynyl)-4-(2-ethylhexyl)-4H-dithieno[3,2-b:2′,3′-d]pyrrole (ADA); in the second structure the anthracene core was functionalised with two dithienopyrrolylethynyl groups, obtaining 9,10-bis((4-(2-ethylhexyl)-4H-dithieno[3,2-b:2′,3′-d]pyrrol-2-yl)ethynyl)anthracene (DAD). The properties of these materials were compared with those of the corresponding polymer: poly[4-(2-ethylhexyl)-4H-dithieno[3,2-b:2′,3′-d]pyrrole-2,6-diylethynylene-anthracen-9,10-diylethynylene] (polyAD). Devices employing PC61BM as an electron acceptor revealed that the monodispersed materials (ADA and DAD) were better performing than polyAD, seemingly due to the better homogeneity of the donor–acceptor blend, as revealed by AFM. The PCE value (1.3%) obtained with DAD ranks among the highest reported for non-polymeric small molecule-based BHJ solar cells constructed without the use of additives or annealing processes, thus demonstrating that ethynylene-containing electron-rich systems are promising donors for organic solar cell applications.

Autore Pugliese

• Gigli Giuseppe , Mazzeo Marco

Tutti gli autori

• Roberto Grisorio , Giovanni Allegretta , SURANNA G , Pietro Mastrorilli , Anna Loiudice , Aurora Rizzo , Marco Mazzeo , Giuseppe Gigli

Titolo volume/Rivista

JOURNAL OF MATERIALS CHEMISTRY

Anno di pubblicazione

2012

ISSN

0959-9428

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

14

Ultimo Aggiornamento Citazioni

2017-04-22 03:20:59

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile